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Each gene has a characteristic mutation rate. Mutation rates are often described as an average per gene basis. For instance, Drosophila has one detectable mutation per 10,000 loci, that is, 0.01% per locus. In humans spontaneous mutation rates have been calculated for some of the dominant lethi1 genes such as retinablastoma, chondrodystrophy and Huntington's chorea. These genes have rates varying from 0.01% to 0.001% per locus which means that one out of 10,000 or 100,000 loci mutates. This is true of most of eukaryotic mutation rates which range from to per locus. Jn prokaryotes the rates may be much lower, ranging from 10-4 to 10-6 per locus. Mutations can also occur in reverse direction by which it is ineant that a mutant gene can mutate back to its wild type form. However, reverse or back mutation rates are much lower than the forward mutation rates.
What are the examples of homeostasis? Regulation of body temperature, control of blood glucose levels, the regulation of salt and water balance are the example of homeostasis
Explain the Nutrition of Fungi? Fungi grow in moist environment and are chemoorganoheterotrophs. What do we mean by chemoorganoheterotrophs? The term chemotroph describes organ
what happens in meiosis in prophase 1?
Biological Adaptation These adaptations depend on the geology and basic fertility of the region and some of the mechanisms that are especially well developed in tropical rain
what are the excretory organ of protozoa ?
Define Requirements of Fluid in Postoperative Nutritional Care Extensive fluid losses may occur through vomiting, haemorrhage, diesis, excudate, fever and sweating after a surg
Define Classification of functions of minerals? The varied functions of minerals can be grouped under four general physiologic roles viz. Structural: They form an integ
Q. What is the difference between simple closed circulation and double closed circulation? Double closed circulation or Closed circulation is that in which the blood circulates
feeding mechanism of man
Define Exchange list vs. Food composition tables for menu planning? A dietician is frequently expected to make quick, yet reasonably accurate estimation of the nutritive value
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